Polymerization catalysts comprising titanium and magnesium

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 4/651 (2006.01) C08F 4/655 (2006.01) C08F 10/06 (2006.01) C08F 210/16 (2006.01) C08F 110/06 (2006.01)

Patent

CA 2510679

A catalyst component for olefin (co)polymerization, and in particular for the preparation of LLDPE, comprising Mg, Ti, halogen and an electron donor compound (ED) belonging to ethers, esters, amines, ketones, or nitriles, characterized in that the molar ratio Mg/Ti is higher than 5, and the molar ratio ED/Ti is higher than 3.5. The said catalyst components display a homogeneous distribution of the comonomer in and among the copolymer chains.

La présente invention concerne un composant catalytique pour la (co)polymérisation d'oléfine, et en particulier pour l'élaboration de LLDPE, comprenant du Mg, Ti, halogène et un composé donneur d'électrons (ED) appartenant au groupe des éthers, esters, amines, cétones ou nitriles, caractérisé en ce que le rapport molaire Mg/Ti est supérieur à 5, et que le rapport molaire ED/Ti est supérieur à 3,5. Ces composants catalytiques présentent une distribution homogène du comonomère à l'intérieur des chaînes de copolymères et d'une chaîne à l'autre.

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